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# vim:fileencoding=utf-8:noet
from __future__ import (unicode_literals, division, absolute_import, print_function)
from powerline.renderers.shell import ShellRenderer
class BashPromptRenderer(ShellRenderer):
'''Powerline bash prompt segment renderer.'''
escape_hl_start = '\\['
escape_hl_end = '\\]'
character_translations = ShellRenderer.character_translations.copy()
character_translations[ord('$')] = '\\$'
character_translations[ord('`')] = '\\`'
character_translations[ord('\\')] = '\\\\'
def do_render(self, side, line, width, output_width, output_raw, hl_args, **kwargs):
# we are rendering the normal left prompt
if side == 'left' and line == 0 and width is not None:
# we need left prompt's width to render the raw spacer
output_width = output_width or output_raw
left = super(BashPromptRenderer, self).do_render(
side=side,
line=line,
output_width=output_width,
width=width,
output_raw=output_raw,
hl_args=hl_args,
**kwargs
)
left_rendered = left[0] if output_width else left
# we don't escape color sequences in the right prompt so we can do escaping as a whole
if hl_args:
hl_args = hl_args.copy()
hl_args.update({'escape': False})
else:
hl_args = {'escape': False}
right = super(BashPromptRenderer, self).do_render(
side='right',
line=line,
output_width=True,
width=width,
output_raw=output_raw,
hl_args=hl_args,
**kwargs
)
ret = []
if right[-1] > 0:
# if the right prompt is not empty we embed it in the left prompt
# it must be escaped as a whole so readline doesn't see it
ret.append(''.join((
left_rendered,
self.escape_hl_start,
'\033[s', # save the cursor position
'\033[{0}C'.format(width), # move to the right edge of the terminal
'\033[{0}D'.format(right[-1] - 1), # move back to the right prompt position
right[0],
'\033[u', # restore the cursor position
self.escape_hl_end
)))
if output_raw:
ret.append(''.join((
left[1],
' ' * (width - left[-1] - right[-1]),
right[1]
)))
else:
ret.append(left_rendered)
if output_raw:
ret.append(left[1])
if output_width:
ret.append(left[-1])
if len(ret) == 1:
return ret[0]
else:
return ret
else:
return super(BashPromptRenderer, self).do_render(
side=side,
line=line,
width=width,
output_width=output_width,
output_raw=output_raw,
hl_args=hl_args,
**kwargs
)
renderer = BashPromptRenderer
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